Merge "Move shared Proxy method and constants to shared lib" am: 385f58bf71 am: 780a72f7e8 am: 2fb35058f8

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1574816

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I8bf2cb335d4154749e69147e9c549e1be548e8a3